Machine for dressing chair-backs



wlw/53a \\\\\\\\\\\\\\\\\\\lA l El! 'ging A M. PHOT-L IT H C0. N Y (OSEDH N ES PROCESS) UNITED STATES i SAMUEL L. iurTS, or ASHBURNHAM, MASSACHUSETTS.

MACHINE FOR DRESSING CHAIR-BACKS.

Spccitication forming part ot' Letters Patent No. 3LP,220, dated July 14, 1863.

To all zrhom it may concern Be it known that l, SAMUEL L. FITTS, otl Ashburnham, in the county ot' 'orcestcr and State of Massachusetts, have invented a new and Improved Machine for Dressing Chair- Backs; and l do hereby declare that the fol lowingis a full, clear, and exact description of the saine, reference being had to the accom-V panying di awings, making a part ot' this specification, in which- Figure 1 is a side sectional view of my invention, taken in the line .r Fig. 2; Fig. 2, a transverse vertical section ofthe same, taken in the line y y, Fig. l; Fig. 3, a plan or top view ofthe same.

Similar letters 'of reference indicate correspondin g parts in the several iigures.

rIhis invention consists in the employment or use of a reciprocating segment bed or carriage, placed on an adjustable bed, in connection with a rotary and vibrating cutter-head and pressure-rollers, all arranged to operate as hereinafter set forth.

To enable those skilled in the artto i'ull y understand and construct my invention, I will proceed to describe it.

A represents a framing,'which may be'constructed in any proper way to support the working parts, and B B represent two curved or segment ways, connected by cross-rods a, and itted at one end loosely on a shaft, C, which is placed transversely in the framing A, and has a pinion, D, on it.

E is a curved or segment bed, which is placed on the ways B B, and allowed to slide freely thereon. At the under side of the bed E there is a rack, F, into which thev pinion I) gears. (See Fig. l.) 0n one end of the shaft O there is placed a toothed wheel, G, into which a pinion, H, on a shaft, I, gears, the shaft I being in the lower part of the framing A, and having upon it two loose pulleys, J J, which are rotated by belts b b from a driving-shaft, K, the belt b' being crossed and the belt b being straight, so that the pulleys J J will be rotated in reverse directions. These pnlleys J J are connected alternately with the shaft I by means of a clutch, L, operated as will be presently described, and by which the direction of the rotation of the shaft C is reversed in order to give a reciprocating motion to the bed E. In the upper part of the framing A, and directly over the bed E, there are placed two pressure-rollers, M M,thejournals of which are fitted in oblong slots c, and having springs l bearing upon boxes e, which rest on the journals of said rollers. Between the rollers M M a rotary cutter, N, is placed. This cutter'is formed by having two knives, ff, attached to a shaft, O, which is driven by a belt, g, from the shaft K. The shaft O has long journals h IL, to admit of said shaft having a certain degree of longitudinal play. One ot' the journals It has a spiral spring, i, upon it, and also has a groove made circumferentially in it to receive the -upper forked end of a lever, P, which is of bent form and has its inlcruin at j. The lower horizontal part ot' this lever l) extends underneath a pin, Q, which is fitted vertically in a socket, R, the latter being attached to a horizontal slide-rod, S, which passes through one side of the framing and is acted upon by a cam, '.l, which has a ratchet, U, attached to it into which apawl, V, catches, said pawl being attached to an arm, W, on a shaft, X, which has two cams, Y Y, upon it, on which the ways B B rest. rlhe lower end ofthe arm W is connected by a link, Z, with a bent lever, A', to which the clutch L is connected, and said lever A' passes through an upright lever, B', which extendsup at one side ofthe reciprocating bed E. To the under side of the bed E there are attached two curved pendent plates, 7c k', and to the side ofthe bed E, near the lever B', or adjoining it, there are placed two pins, Z, one near each end ot' the bed. The chair-backs C' are got out of the proper shape and placed, one at a time, on the bed E, and underneath the rollers M M and cutter N, the rollers holding the back in proper position while the cutterN is acting upon it. The cutter acts upon the back C' when the bed E is moving in the direction indicated by the arrow l, and when the bed has reached the termination of that movement one of the pins l will strike the upper end of the lever B', and actuate the bent lever A' so that the clutch will be made to shift its position on the shaft andengage with the pulley J, which will reverse the movement ofthe bed E. rlhis actuating of the lever A' also moves the arm XV and pawl V, the latter, through the medium of the ratchet U,turning the cam T, which slides the socket R, and brings the pin Q under theplate k', which, as the bed E moves back in the direction of arrow 2, acts upon the pin Q, and forces it down upon the lever P, so that the latter will move the critter N longitudinally, the plate k having moved the critter during the previous movement of the bed F. This longitudinal movement ofthe cutter N may he varied ormodiiied to suit the character of the work required. The sprin g I gives the return movement to the critter, and a spring, t", gives the return movement to the socket R. At the termination of the movement of the bed E, in thedirection indicated by the arrow l, the shaft X is turned by the movement of the arm WV andthe cams Y Y let down the ways B B, so that the cutter will not act upon the back C during the back movement of the bed F, each back being operated upon during two forward movements of the bed E. The arrangement as a whole is extremely simple and efficient. The bed E is varied during the termination of its backward movement by the proper pin Zcoming in contaet with the upper end ofthe lever B.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The reciprocating` segment-bed E, placed on the adjustable ways B B, and operated substantially as shown, in combination with the pressure-rollers M M and the rotary cutter N, all arranged as and for the purpose specified.

2. The arrangement and combination of the shaft X, provided with the cams YY, the arm W, pawl V, ratchet U, the levers P A', cam T, socket R, with pin Q, the spring i on the journal ofthe critter N, and pins ZZ at the side of bed E, all arranged as and for the purpose herein set forth.

SAMUEL L. FITTS.

fitnesscsz WILLIAM P. ELLIS, OIIIo WHITNEY, Jr. 

